32v 1m clri
From Computer History Wiki
CLRI(1M) UNIX Programmer's Manual CLRI(1M)
clri - clear i-node
clri filesystem i-number ...
_C_l_r_i writes zeros on the i-nodes with the decimal _i-_n_u_m_b_e_r_s on the _f_i_l_e_s_y_s_t_e_m. After _c_l_r_i, any blocks in the affected file will show up as `missing' in an _i_c_h_e_c_k(1) of the _f_i_l_e_s_y_s_t_e_m.
Read and write permission is required on the specified file system device. The i-node becomes allocatable.
The primary purpose of this routine is to remove a file which for some reason appears in no directory. If it is used to zap an i-node which does appear in a directory, care should be taken to track down the entry and remove it. Oth- erwise, when the i-node is reallocated to some new file, the old entry will still point to that file. At that point removing the old entry will destroy the new file. The new entry will again point to an unallocated i-node, so the whole cycle is likely to be repeated again and again.
If the file is open, _c_l_r_i is likely to be ineffective.